package Interface;

public class Computer {
    public void PowerOn() {
        System.out.println("打开电脑....");
    }

    public void PowerOff() {
        System.out.println("关闭电脑....");
    }

    public void opendevice(USB usb)
    {
        if(usb instanceof Mouse)
        {
            Mouse mouse = (Mouse)usb;
            mouse.click();
        }
        else if(usb instanceof Keyboard)
        {
            Keyboard keyboard = (Keyboard) usb;
            keyboard.press();
        }
    }
}
